Class 3,Cost-Optimized,Flyback Converter Reference Design for PoE Applications


Design files


This reference evaluation module, featuring the TPS23753A PoE interface and isolated converter controller, is used for class 3 PoE applications where low cost is required.

The flyback topology with diode rectifier results in a low cost converter with reasonable size and efficiency.

  • Isolated non synchronous flyback
  • 5V at 2A output
  • Low cost
  • Uses TPS23753A IEEE 802.3-2005 PoE PD and PWM controller
  • Small board size
  • This circuit is fully functional tested and recommended for new designs
Output voltage options PMP7355.1
Vin (Min) (V) 36
Vin (Max) (V) 57
Vout (Nom) (V) 5
Iout (Max) (A) 2
Output Power (W) 10
Isolated/Non-Isolated Isolated
Input Type DC
Topology Flyback- Non Sync^POE
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

SLVU842.PDF (391 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

SLVRB20.PDF (40 K)

Detailed schematic diagram for design layout and components

SLVRB21.PDF (114 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

SLVC475.ZIP (506 K)

Design file that contains information on physical board layer of design PCB

SLVU843.PDF (155 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Powered devices

TPS23753AIEEE 802.3-2005 PoE interface and Isolated Converter controller with Enhanced ESD Ride-Through

Data sheet: PDF | HTML
Shunt voltage references

TLV431A1% accuracy, low-voltage, adjustable precision shunt regulator

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Technical documentation

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Type Title Date
Test report PMP7355 Test Results Sep. 16, 2013

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